Global Patent Index - EP 0899645 A3

EP 0899645 A3 20020703 - Field effect transistors

Title (en)

Field effect transistors

Title (de)

Feldeffekttransistoren

Title (fr)

Transistors à effet de champ

Publication

EP 0899645 A3 20020703 (EN)

Application

EP 98115254 A 19980813

Priority

FI 973574 A 19970901

Abstract (en)

[origin: EP0899645A2] A method of calibrating a field effect transistor having a source (3), a drain (4), a resistive gate (2), and a calibration DC current source (7) and a calibration DC current sink (7) coupled to respective spaced apart regions of the transistor gate (2). In use a substantially DC calibration current is passed through the gate (2) between said spaced apart regions to trim the effective width of the transistor channel. <IMAGE>

IPC 1-7

G05F 3/26; H03M 1/10; H01L 29/43

IPC 8 full level

H03M 1/74 (2006.01); G05F 3/26 (2006.01); H03M 1/10 (2006.01)

CPC (source: EP US)

G05F 3/262 (2013.01 - EP US); H03M 1/1057 (2013.01 - EP US); H03M 1/742 (2013.01 - EP US)

Citation (search report)

  • [XY] GB 1225399 A 19710317
  • [XY] FI 953433 A 19970115 - NOKIA MOBILE PHONES LTD [FI] & US 5831303 A 19981103 - RAPELI JUHA [FI]
  • [A] US 4602170 A 19860722 - BERTIN CLAUDE L [US]
  • [A] US 5557234 A 19960917 - COLLINS STEPHEN [GB]
  • [Y] TANG A T K ET AL: "Novel self-calibrated high-speed D/A converter using trimmable current sources", CIRCUITS AND SYSTEMS, 1994. ISCAS '94., 1994 IEEE INTERNATIONAL SYMPOSIUM ON LONDON, UK 30 MAY-2 JUNE 1994, NEW YORK, NY, USA,IEEE, US, 30 May 1994 (1994-05-30), pages 469 - 472, XP010143427, ISBN: 0-7803-1915-X
  • [A] DE WIT M ET AL: "A LOW-POWER 12-B ANALOG-TO-DIGITAL CONVERTER WITH ON-CHIP PRECISION TRIMMING", IEICE TRANSACTIONS ON ELECTRONICS, INSTITUTE OF ELECTRONICS INFORMATION AND COMM. ENG. TOKYO, JP, vol. E76-C, no. 5, 1 May 1993 (1993-05-01), pages 795 - 801, XP000381121, ISSN: 0916-8524
  • [A] GROENEVELD D W J ET AL: "A SELF-CALIBRATION TECHNIQUE FOR MONOLITHIC HIGH-RESOLUTION D/A CONVERTERS", IEEE JOURNAL OF SOLID-STATE CIRCUITS, IEEE INC. NEW YORK, US, vol. 24, no. 6, 1 December 1989 (1989-12-01), pages 1517 - 1522, XP000100482, ISSN: 0018-9200

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0899645 A2 19990303; EP 0899645 A3 20020703; FI 103617 B1 19990730; FI 103617 B 19990730; FI 973574 A0 19970901; FI 973574 A 19990302; JP H11186909 A 19990709; US 6181194 B1 20010130

DOCDB simple family (application)

EP 98115254 A 19980813; FI 973574 A 19970901; JP 24569998 A 19980831; US 13324098 A 19980813